Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 30: Skyrmions II

MA 30.2: Vortrag

Mittwoch, 20. März 2024, 15:30–15:45, EB 301

Probing Chirality and Topology in Ferrimagnetic Multilayer Systems — •Tamer Karaman¹, Kai Litzius¹, Daniel Metternich², Timo Schmidt¹, Aladin Ulrich¹, Andrada-Oana Mandru³, Reshma Peremadathil Pradeep³, Hans Josef Hug³, Manfred Albrecht¹, and Felix Büttner^1,2 — ¹University of Augsburg, Germany — ²Helmholtz-Zentrum Berlin, Germany — ³EMPA, Dübendorf, Switzerland

Chiral rare-earth transition metal ferrimagnets show promise for skyrmion-based spintronics applications due to their unique material properties, such as Néel-type bulk DMI, tunable anisotropy, and negligible stray fields [1, 2]. This class of ferrimagnets combines features from both ferromagnets and antiferromagnets [3]. Using Fresnel Lorentz Transmission Electron Microscopy, we investigate thick ferrimagnetic Dy/Co multilayer films. We observe the coexistence of skyrmions and topologically trivial bubbles under varying tilt and magnetic fields, revealing a delicate balance of micromagnetic interactions. Additionally, a stable worm domain pattern emerges, acting as a guiding pathway for normal domains. This study underscores the importance of local real-space probes in understanding chiral ferrimagnets, paving the way for further exploration and exploitation of these materials.

1. Kim, S. K. et al. Nat. Mater. 21, 24 (2022). 2. Fert, A., et al Nat. Rev. Mater. 2, 17031 (2017). 3. Caretta, L. et al. Nat. Nanotechnol. 13, 1154 (2018).

Keywords: Ferrimagnets, Skyrmions, L-TEM Microscopy